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Effect of myristyl trimethyl ammonium bromide on the physicochemical and biological properties of an experimental adhesive resin

Huertas Mogollón G.; Garcia I.M.; Visioli F.; Collares F.M.; Leitune V.C.B. · International Journal of Adhesion and Adhesives (2026) · DOI: 10.1016/j.ijadhadh.2025.104254

Resumen

This study aimed to evaluate the effect of the addition of myristyl trimethyl ammonium bromide (MYTAB) on the physicochemical and biological properties of an experimental adhesive resin. The adhesive resin was formulated with methacrylate monomers and a photoinitiator system. The quaternary ammonium compound MYTAB was added at 0.5 (G0.5 %), 1 (G1 %), and 2 (G2 %) wt.% in the adhesive resin. A group without the addition of this compound was used as a control (GCtrl). The resins were evaluated for polymerization kinetics and degree of conversion (DC, n = 3), ultimate tensile strength (n = 5), contact angle and surface free energy (n = 5), cytotoxicity (n = 5), and antibacterial activity against Streptococcus mutans considering the biofilm formation (n = 3) and planktonic bacteria (n = 3). The polymerization kinetics were similar between all groups, and there was no difference regarding ultimate tensile strength (p > 0.05). There was a statistical difference between G0.5 % and G1 % for the DC (p < 0.05). G1 % presented the highest DC. There was no difference among groups for the water contact angle (p > 0.05). G2 % had the highest contact angle value with α-bromonaphthalene (p < 0.05), but there was no difference among groups regarding surface free energy (p > 0.05). The cell's viability ranged from 90.43 (±3.35) % for GCtrl to 40.79 (±8.44) % for G2 % (p < 0.05), without statistical difference between GCtrl and G0.5 % (p > 0.05). All groups with MYTAB showed higher antibacterial activity against biofilm formation and planktonic bacteria than the control group (p < 0.05). The addition of 0.5 % of MYTAB induced antibacterial activity for the adhesive without affecting physicochemical and biological properties.

Instituciones: Universidad Científica del Sur